David Lifton was born in New York in 1939. A graduate of the Cornell University School of Engineering Physics he worked as a computer engineer for North American Aviation in Los Angeles. Lifton worked on the Apollo space program but left the company in 1966.
Lifton now concentrates on his research into the assassination of John F. Kennedy and particularly the life of Lee Harvey Oswald. He has read all the material published by the Warren Commission. He also spent several months at the National Archives in Washington and interviewed many of the important witnesses in the case.
Lifton published an important article on the assassination in Ramparts. He also served as consultant on the Hollywood movies, Executive Action and Oliver Stone's JFK. Lifton also appeared before the House Select Committee on Assassinations and as an expert witness before the Assassination Records Review Board.
In 1980 Lifton published Best Evidence: Disguise and Deception in the Assassination of John F. Kennedy. Lifton claims that members of the Secret Service agents were involved in the killing of Kennedy. Their involvement was the key to the secret alteration of the President's wounds.
In the book Lifton argued that the wounds contained in the body of John F. Kennedy were altered somewhere between Parkland Hospital and Bethesda Hospital. Lifton believes that the wounds were altered in order to hide the fact that he had been shot from the front, e.g. the Grassy Knoll. The book was a bestseller and was nominated for a Pulitzer Prize in history.